Transcript
Circulatory System
Circulatory System! Transport substances around the body
! Carries oxygen & nutrients to cells ! picks up carbon dioxide & wastes from cells
Circulatory System! 3 necessary components:
! Heart (pump) ! Blood (fluid) ! Blood vessels (arteries and veins)
! What are the four chambers of the heart called?
! What side has deoxygenated blood? ! Where do the two sides of the heart send
blood?
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! What are the four chambers of the heart called?
! What side has deoxygenated blood? ! Where do the two sides of the heart send
blood?
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Heart! 4 chambers ! Right side pumps to the lungs ! Left side pumps to the rest of the body
Heart - Anatomy
! What are the functions of the circulatory system?
! What are the three parts? ! Draw a heart & label the four chambers ! Put arrows on to show where
deoxygenated blood enters the heart. ! Put arrows on to show where oxygenated
blood exits the heart. ! Which side of the heart is bigger? Why?
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And the Beat Goes On…Purpose: To calculate our heart rate at different activity levels. Hypothesis:
Observation: Acitivty # beats / 10 seconds # beats / min
lying down
sitting
standing
after exercise
And the Beat Goes On…Analysis: 1. Make a line graph of heart rate VS activity level. 2. What general statement can you make about heart rate & activity. 3. How did your hypothesis compare to the observations? 4. Why does the heart speed up when our activity increases?
Blood Vessels! Network of tubes throughout
the body to transport blood ! Arteries
! Carry blood AWAY from the heart
! Contain elastic connective tissue and muscle
Blood Vessels! Veins
! Carry blood BACK TO the heart
! Receive blood from capillaries
! Contain valves ! Valves prevent backflow
Blood Vessels! Capillaries
! microscopic vessels, one cell thick ! the place where substance get into or out
the circulatory system ! Bridge between arteries and veins
Blood! Connective tissue ! about 5L ! Mostly Red Blood Cells
! Contain hemoglobin which carries the oxygen ! Produced in the bone marrow ! Lack a nucleus
Blood! White blood cells
! AKA Leukocytes ! Fight infections by destroying invading
bacteria/viruses ! Have a nucleus
Blood! Platelets
! Assist in blood clotting ! <1% of blood volume
Blood! Plasma (mostly water)
! Protein-rich liquid ! Half of blood’s volume
Homework! P 87 # 3, 4, 9 ! Circulatory CROSSWORD
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